1 files changed, 49 insertions, 0 deletions
diff --git a/layout/style/TopLevelImageDocument.css b/layout/style/TopLevelImageDocument.css
new file mode 100644
index 0000000000..f03295f673
--- /dev/null
+++ b/layout/style/TopLevelImageDocument.css
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+  This CSS stylesheet defines the rules to be applied to ImageDocuments that
+  are top level (e.g. not iframes).
+*/
+
+@media not print {
+  :root {
+    /* The font color here was chosen to be readable over the corresponding
+       backgrounds. This is important in case this ImageDocument is for an
+       image that happens to be corrupt, in which case we'll display a textual
+       error message over the background, instead of the image itself. */
+    color: #eee;
+    /* The background-attachment is fixed to stop an ugly white gutter
+       from appearing when the document is overscrolled. */
+    background: url("chrome://global/skin/media/imagedoc-darknoise.png") fixed;
+  }
+
+  img.transparent {
+    color: #222;
+    background: hsl(0,0%,90%) url("chrome://global/skin/media/imagedoc-lightnoise.png");
+  }
+
+  img {
+    text-align: center;
+    position: absolute;
+    inset: 0;
+    margin: auto;
+  }
+
+  img.overflowingVertical {
+    /* If we're overflowing vertically, we need to set margin-top to
+       0.  Otherwise we'll end up trying to vertically center, and end
+       up cutting off the top part of the image. */
+    margin-top: 0;
+  }
+
+  .completeRotation {
+    transition: transform 0.3s ease 0s;
+  }
+}
+
+img {
+  image-orientation: from-image;
+}